// 节流函数
export function throttle(fn, gapTime) {
	if (gapTime == null || gapTime == undefined) {
		gapTime = 1500
	}
	let _lastTime = null
	// 返回新的函数
	return function() {
		let _nowTime = +new Date()
		if (_nowTime - _lastTime > gapTime || !_lastTime) {
			fn.apply(this, arguments) //将this和参数传给原函数
			_lastTime = _nowTime
		}
	}
}

module.exports = {
	throttle: throttle
}